Power driven razor



Jan. 9, 1940. A E, JENSEN 2,186,110

POWER DRIVEN RAZOR v Filed April 13, 1957 2 SheGS-Sheet l .umllllllllmlllf .nl l

Jai 9, 1.940. A. .JENSEN l 2,186,110

POWER" DRIVEN RAZOR Filed April 13, 1937 2 sheets-sheet 2 .'45 K EZ-@ 4 44 l/ ,45 .al

IIIIHIIIIHIHIIHIHIIII 5w ZA Patented Jan. 9, 1940 PATENT Vori-ICE POWER DRIVEN RAZOR Arthur E. Jensen,

Anaheim, Calif.

Application April 13, '1937, Serial No. 136,597

9 Claims.

My invention relates to power driven razors and has particular reference to a machine adapted to clip or shear hair close to the skin, adapting the same to beused for shaving purposes.

In adapting hair clipping or shearing machlnes to be usedl as razors. considerable diiliculty has been encountered in locating the shearing edges of the machine suillciently close to the skin to effectively cut the hair therefrom at the skin surface without allowing the skin to be endangered by the movable shearing blades'.

In my copending application Serial No. 105,251, filed October 12, 1936, patented February 7, 1939, No. 2,146,298, I disclose a hair clipping or shearing machine in which a relatively thin stationary blade is employed in cooperation with a relatively heavy shearing blade reciprocating relative to the stationary blade for the lpurpose of presenting the actual shearing edges of the two` engaged by the machine. In said copending application I disclosed a stationary blade member which included a shearing edge from which extended a .plurality of guard ribs, the guard ribs acting to support and lend rigidity to the blade whereby ther blade could be made extremlyjthin and in which` a movable blade reciprocated longitudinally of* the ribs to approach the stationary blade and shear the hair therebetween: along the principle of shearing employed in lawn 'inovterss The present invention constitutes an improvement over the construction shown 'in thoelysaid copending application and has for its principal object the production of a rlzor employing a movable lblade oscillating `loy tuiiinallyuzowardf1` and away from a stationary` blade and in ,which the length of the movable blade betweenitspivot point and its cutting ,edge is such that thear`c through which the movable blade swings* is sub- A stantiallynormal to the direction in Ywhich the yhair extends from'theskln.

Another object of my invention is to provide L a razorlof the 'character set forth in ,thepreceding paragraph wherein by employing a relatively great length voi blade between the pivot point andi.

the cutting edge a greater length of movement of f' t the edge of the blade in substantial parallelism rotary motor may be employed for producing an oscillation of the movable 'blade and wherein an eccentric mounted directly upon the motor shaft may be employed to produce the oscillatory motion of the blade by direct connection therewith. 5 Another object of my invention is to provide a stationary blade and guard member wherein the guard ribs are presented to the skin surface having depressions therein permitting the skin to project closer to the path of movement of the movable blade at one or more points along each of said ribs whereby the movement of ythe movable blade will be enabled to pick up hairs pro-l jecting from the skin and swing them into shearing relation between the stationary and movable blades.

Other objects and advantages of my invention will be apparent from a study of the followingl specifications, read in connection with the ,accompanying drawings, wherein: d

` Fig. 1 is a. vertical sectional view taken through a razor constructed in1accordance with my invention, substantially alongthefmedian vertical plane thereof ;l i

F1842 is a plan view of the razor illustrated in F1g.1;, ,y ,y

,Flg. `3 is a vertical elevationaly view of the razor illustrated in Fig. l, showing tlehandle or case of the razor with the front portion thereof removed; i

Fig. 4 is an enlarged sectional view of the razor head shownl in Fig. l, illustrating the shape of the guard ribs and the movable and stationary blades; i 1 v o'.i'ia v5 is a detail sectional view through the guard ribs, stationary blade and movable blade Fig. 4; and

akenealong the line V-V of al view taken along Fig. 6 is a detailed section line'YJI-VI of Fig. 4.

- Fig. 7 is a perspective view of the stationary blade and guard members and the movable blade shwing their relation with each other.

Referring to the drawings, I have illustrated in Figs. l and 2 the general construction of a razor constructed in accordance with my invention which comprises a suitable handle member vor case I which may be constructed in any of the conventional manners, vsuch as by casting the same of Bakelite or similar molded material in two half sections.' including a rear section 2 and a front section 3. The rear section I of the handle or case I may comprise a hollow shell adapted y 1 to receive and support suitable motive power means illustrated herein as comprising an electric motor 4. The motor 4 may be of any de- Aso sired construction though I prefer that the same shall include a pair of field poles 5 and 6, each adapted to receive a field energizing coil 1 and 8, respectively. I prefer to locate the field poles 5 and '6 at opposite ends of the casing section 2 to provide therebetween a relatively large space adapted to receive the armature 9 of the motor. The armature 9 is illustrated as being mounted upon an armature shaft I0 suitably supported at either of its ends in bearing members II and I2, these bearing members being formed in any desired manner as by employing bosses extending from straps I3 and I4, one on each of the front and rear sides of the field pole members 5 and 6. The straps I3 and I4 may comprise the frame of the motor as by riveting the members I3 and I4 together by` rivets I5 which extend through the laminations comprising the field poles 5 and 6. The extreme ends of the straps I3 and I4 may be bent outwardly to constitute lugs I6 and I1 by which the motor may be secured torthe casing section 2 as by means of screws I8.

The motor shaft III may be provided with an eccentric bushing I9 pinned or otherwise rigidly secured to the shaft I0, as indicated at 20, so that as the motor shaft I0 rotates the eccentric will be rotated thereby.

It will therefore be observed that the motor 4 may be completely assembled in the .casing section 2 and the casing section 3 will therefore merely act as a cover for the motorl 4.

For purposes of clarity of illustration herein, no make and break devices arev illustrated on the motor though it will beunderstood by those skilled in the art that to adapt this motor for operation on direct current suitable make and break switching apparatussuch as that shown in the Schick Patent No.*2,064,038, December 15,'

1936, may be employed, while when used on alternating current the armature shaft III may be provided with an extension projecting through the casing section 3 to permit the -same to be manually started.v

By referring particularly to Fig. 1, it will be observed that the casing section 2 has at its upper end a forwardly projecting shelf member 2I and that the upper surface ,22 thereofk is formed upon an angle which extends at a considerable angle to the horizontal, 'this shelf and the upper surface thereof constituting a support for a head 23 which includes the shearing mechanism. The head 23 may be constructed of a relatively flat and relatively heavy plate 24, from the side edges of which, nearly the rear of the plate, extends a pair of bearing brackets 25 and 26, in which brackets is journaled a shaft 21 which in turn constitutes the pivot mounting of a movable or oscillating blade 28.` The blade 28 comprises a relatively flat plate ofsuitable metal,

the rear end of which rests against the flat face 29 on the shaft 21 and is secured to the shaft 21 as by means of a pair of screws 30. The movable blade 28 is provided upon its outer end with a plurality of fingers 3I, the outer ends of these ngers comprising the cutting edge 32 of the oscillating blade. Intermediate. the cutting edge 32 and the shaft 21 I connect the power mechanism by which the blade -26 is oscillated. This power mechanism is illustrated as aneccentric strap 33 surrounding the eccentric I9, the ends of the 'eccentric strap 33 being bent upwardly as indicated at 34 to provide Iears through which a pin 35 may extend to couple a connecting rod 36' to the strap 33. 'I'he upper end of the connecting rod 36 is bent inwardly as indicated at 31 and is provided with an opening 38, through which extends the lower threaded end of a rod 39. The upper end of the rod 39 is preferably formed as a ball 40 which seats within a socket formed by a semi-spherical ,depression 4I in the blade 28 while the complementary half ofthe socket is formed by a semi-spherical member 42 secured. to the upper surface of the blade 28 as by means of screws 43.I w

With the construction thus far described, it will be apparent that rotation of the motor shaft I0 will be transmitted through the eccentric I9, connecting rod 36 and ball and socket joint 4II-4I--42 as an oscillatory movement of the blade 28 in a vertical direction as viewed in Fig. 1.

By reason of the fact that the pivot shaft 21 for the blade 28 is located at the rear end of the plate 24, the cutting blade 28 may have a length almost equal to the full length of the plate 24 and thus the arc 44 described by the cutting edge 32 of the blade 28 will be along a relatively great. radius so that the arc 44 closely approaches a straight line.

It will be understood that the views of the razor illustrated in Figs. l, 2 and 3 thereof are considerably enlarged over the actual dimensions of the razor as it is manufactured for use. In actual construction the radius along which the cutting edge 32 moves is preferably from 1 inch to 11A inches in length. It will also be observed that the total stroke of the outer or cutting edge of the blade 28 will be relatively short, less than 1h inch. By reason of this construction, the arc described by the oscillatory movement of the outer edge of the blade will be substantially along a straight line or, to state it more exactly, that section of the arc which is employed for engaging the hairs and shearing them constitutes a short arc of relatively great radius.

It will thus be observed that'as distinguished from previous razor constructions the movable blade will swing throughout its entire stroke along the line which is substantially Aparallel to the skin surface, indicated in Fig. 1 at 45.

The movable blade 28 is adapted to cooperate with a stationary shearing blade 46 which is formed upon and preferably integrally with a guard plate 41. The guard plate 41 is formed with a base 48, through which a plurality of screws 49 may extend into an enlarged or thickened front edge 50 of the head plate 24. The guard plate 41 includes an edge rib 5I at each of its sides, between which is formed a plurality of slots 52 as by cutting or milling through the thickness of the guard plate 41, leaving a plurality of relatively thin guard ribs 53 extending from the base 48 to a strip of metal interconnecting the edge ribs 5I, which strip of metal constitutes the stationary shearing blade 46.

By referring particularly to Figs. 1 and 6, it

will be observed that the guard ribs 53 extend throughout the thickness of the guard plate 41, entering into the space between the fingers 3| of the movable blade 28 so that these guard ribs may be made of any desired depth to achieve rigidity in the direction normal to the contact of the guard plate with the face and such ribs act as braces supporting the stationary blade 46 rigidly even though the ribs 53 may each be made relatively thin.

By reason of this construction the slots 52 into which the hairs may project are made relatively great without sacrifice of rigidity of the guard ribs 53 and Without weakening the stationary blade member 46. Also by reason of this conarcano struction the stationary blade member 46 may be made extremely thin, namely. a few 1000ths of an inch thick, so that the shearing contact between the cutting edge 32 of the oscillating blade 28 and the blade 46 may be located within a few 1000ths of an inch of the outer or skin-contacting surface of the guard ribs 53 andan extremely close cutting or clipping of the hairs to the skin may be accomplished. It will be noted that as the razor is drawn downwardlyover the skin surface 45 any projecting hairs 54 will enter the spaces between the guard ribs 53 and when the oscillating blade 28 starts its movement toward theystationary blade 46 the cutting edge 32 of the blade 26 will pick up the hair and swing it toward the stationary blade 46 where it will be sheared.

It will be noted that the base 46 is undercut below the outer surface of the ribs 53, as indicated at 55, so that as the razor is drawn downwardly the hairs 54 will be substantially combed into the space between the ribs 53. In order to further assist in achieving a close clipping or cutting of the hairs, I prefer to provide depressions in the ribs 53, both at' the rearward portion of the stroke of the oscillating blade 26 and at the forward portion of the stroke of the oscillating blade 28, as indicated respectively at 56 and 51, such depressions being readily formed as by grinding an arcuate curve across all of the ribs 53. A depression 56 is preferably formed along an arc of relatively great radius so that a considerable area of the skin will sink into this depression and thus present a greater length of hair to be picked up by the moving edge 32 of the blade 28. However, the arc of the depression 51 immediately in advance of the stationary blade 46 may be made along a shorter radius so as to provide a substantial shoulder 51 on the ribs 53, pressing the skin surface 45 inwardly and drawing it substantially taut immediately in advance of the approaching stationary blade 46.

By referring particularly to Fig. 2, it will be noted that the shaft 21 is provided with bearing ends 21a at each of its ends, which are received in the bearing brackets 25 and 26. By forming annular recesses 59- in the bearing ends of the shaft, these recesses may be packed with suitable lubricant for the shaft bearings.

In order to compensate for any wear which may occur between the bearing pins 21 and the brackets 25 and 26 which may tend to prevent accurate shearing contact between the blade 28 and the stationary blade 46, I provide a spring 66 secured to the head plate 24 as by means of screws 6I, the spring 60 being bentupwardly to engage a ball 62 in a recess 63 formed approximately centrally of the rear of the shaft 21. The employment of the spring 60 and ball 62 will 4tend to move the oscillating blade 26 constantly toward the stationary bladev46 with a minimum of friction between the shaft and the spring.

With the construction herein described, it will l be apparent that a simple motor and casing It will also be noted that by constructing the head 24 as a plate extending transversely across one end of the handle member I, that is, substantially transversely to the longitudinal axis of the handle member I. and mounting the stationary blade 46 and its guard plate at one end of the head plate and pivoting the movable blade 28 at the opposite end of the head plate, the surface of the stationary blade and guard plate is disposed in a plane substantially parallel to a plane drawn along the vlongitudinal axis of the handle member and the razor is adapted to be held comfortably with the casing I extending parallel, or substantially parallel, to the skin surface over which the razor is to be drawn, thus distinguishing my construction from previous types of razors wherein the skin-contacting surface was so disposed relative to the handle as to require the handle to extend at substantially right angles to the skin surface to be shaved.

A By reason of the construction herein described, the cutting vedge of the movable blade swings along a line which is substantially parallel to the skin surface, thus providing a greater effective length-oi' stroke to the cutting edge to pick up hairs and straighten them out to a position normal to the skin surface prior to the shearing of the hair and thus the hair may be cut much.

struction shown or described herein, exceptas de fined in the appended claims.

I claim:

1. In a power driven razor, a handle member, a head plate secured at one end of said handle member and extending transversely to the longitudinal axis thereof, a stationary blade member comprising a plate having considerable surface area adapted to be drawn overa skin area .to be shaved, means mounting said stationary blade member at one end oi' said head plate to dispose the surface of said stationary blade member in a plane substantially parallel to the longitudinal axis of said handle member, a stationary blade on said stationary blade member extending transversely across said surface. and a movable blade member comprising an elongated plate. having a cutting edge `disposed transversely across one end thereof, means pivoting the other end of said movable blade near the opposite end of said head plate whereby the arc described by said cutting edge will be about a radius substantially equal to the length of said head plate.

2. 'In a power driven razor, a head plate. a stationary blade member on one end of said head plate having askin-contacting surface disposed in a plane substantially transverse to the surface of said head plate, an elongated movable blade member having'one of its ends formedwith cutters cooperating with said stationary blade member, and means pivoting the other endof said movable blade member near the opposite end of plate, a handle member attached to said head 15 plate, power means in said handle and means connecting said power means to said movable blade at a point intermediate the ends of said movable blade.

3. In a power driven razor, a head plate, a stationary blade member on one end of said head plate having a skin-contacting surface disposed in a plane substantially transverse to the surface of said head plate, an elongated movable blade l member having one of its ends formed with cutters cooperating with said stationary blade member.

and means pivoting the other end of said movable blade member near the opposite end of said head plate whereby the cutters may swing in an arc the radius of which is substantially equal to the distance between the said ends of said head plate, an elongated handle member attached to said head plate, a motor in said handle having a rotating armature, and connecting means coupling the armature of said motor to said movable blade at a point intermediate the ends of said movable blade to translate the rotation of the armature as an oscillatory movement of said blade.

4. In a power driven razor, a head plate, a stationary blade member on one end of said head plate having a skin-contacting surface disposedI in a plane substantially transverse to the surface of said head plate, an elongated movable blade member having one of its ends formed with cutters cooperating with said stationary blade member, and means pivoting the other end of said movable blade member near the opposite end of said head plate whereby the cutters may swing in an arc the radius of which is substantially equal to the distance between the said en`ds of said head plate, an elongated handle member attached to said head plate, a motor in said handle having a rotating armature, an eccentric on said armature, and a connecting rod coupling said eccentric to said movable blade to oscillate said blade as said armature rotates.

5. In a power driven razor, a head plate, a stationary blade member on one end of said head plate having a skin-contacting surface disposed in a plane substantially transverse to the surface of said head plate, an elongated movable blade member having one of its ends formed with cutters cooperating with said stationary blade member, and means pivoting the other end of said movable blade member near the opposite end of said head plate whereby the cutters may swing in an arc the radius of which is substantially equal to the distance between the said ends of said head plate, an elongated handle member having one of its ends adapted to mount said head plate, a motor in said handle having a rotatable armature disposed for rotation about an axis ,transverse to the longitudinal axis of said handle member, and an eccentric on said armature, and a connecting means coupling said eccentric to said movable blade, said connecting means extending through said head plate.

Y 6. In a power driven razor, a head plate, a stationary blade member on one end of said head plate having a skin-contacting surface disposed in a plane substantially transverse to the surface of said head plate, an elongated movable blade member having one of its ends formed with cutters cooperating with said stationary blade member, and means pivoting the other end of said movable blade member near the opposite end of said head plate whereby the cutters may swing in an arc the radius of which is substantially equal to the distance between the said ends of said head plate, a handle member attached to said head plate, power means in said handle member and connecting means coupling said power means to said movable blade, said connecting means including a rod having a ball thereon, and a ball socket formed upon said movable blade intermediate its ends for receiving said ball.

7. In a stationary blade member for a razor, a stationary blade adapted to be drawn transversely across a skin area to be shaved and having a surface adapted to slide over the skin surface, a plurality of spaced guard ribs extending from the edge of said blade in the direction of movement .thereof over the skin, the outer edges of said ribs constituting a continuation of the surface of said blade, and a transverse depression in each of said rib edges immediately adjacent said blade whereby the skin is depressed toward said 4blade as said blade is drawn over the skin surface.

8. In a razor having a stationary blade and a movable blade cooperating together to produce a shearing action, a movable blade having a cutting edge adapted to be moved through a fixed path, a stationary blade extending transversely of said path and having an outer surface adapted to engage and slide over a skin surface to be shaved, a plurality of guard ribs extending from said stationary blade in the direction of movement of said stationary blade over said skin surface, the outer edges of said ribs constituting a continuation of said surface of said stationary blade, and extending parallel to the path described by said movable blade edge, and a transverse depression in each of said ribs immediately adjacent said stationary blade whereby the space defined between the edge surface of said ribs and the path of said movable blade edge is reduced to allow the skin to project closely to said movable blade ledge immediately in advance of said stationary blade.

9. In a razor having a stationary blade and a movable blade cooperating together to produce a shearing action, a movable blade having a cutting edge adapted to be oscillated through a fixed. arcuate path of predetermined length and curvature, a stationary vblade having a surface adapted to engage and slide over the skin surface to be shaved and having an edge disposed toward and transversely of the path of said movable blade and near one end of said path, a plurality of guard ribs extending from said edge in the direction of the path of movement of said movable blade, the edges of said ribs constituting an arcuate continuation of the skin engaging surface of said stationary blade concentric with said path and` of greater length than said path, and a pair of depressions in each of said ribs one adjacent and immediately in advance of the edge of said stationary blade and the other adjacent the opposite end of the path of movement of said movable blade. l

' ARTHUR E. JENSEN. 

